schneider



EJSCHNEI'DER." APPARATUS FOR Paonucma H'ooPmGEFsTs IN METAL TUBES.

APPLxcAloNl FILED 001.29; 1920.

1,429,539.,` `PatendSeptJ19,-1922.

6 SHEETS-SHEET 1.

A fr f 1 E. scHNE|nER-` VAPPARATUS FOR PRODUCING HOOPING EFFECTSIN METALTUBES.

' y APPLICATION FILED ocT.29.192o. ;,429,539.

menteasept. 19,1922.

SHEETS-SHEET 2.

1,429,589. Patented sept. 19,1922.

6 SHEETS-SHEET 3.

IIHIHIIHI I l A l 5.' G/a/{IIIHD IIIIII I l; III'I'I I 1| ll I v I I,'III I II I: ,III 'I l E. SCHNEIDER.

APPARATUS FOR PRODUCING HOOPING EFFECTS |N METAL TUBES. APPLICATIONFILED ocT. 29, |920.

1,429,539. Patentedsept. '19, 1922,

ad e SHEETS-SHEET 4. F19: 2.

L. SCHNEIDER; 'APPARATUSFOR PRODUCING HOOPINGy EFFECTS IN METAL TUBES. V

. l APPLICATION FILED ocf. 29, 1920. 1,429,539.-

Patented Sept. `19, v1922.

6 SHEETS-SHEET 5.,I

. E.'scHNE|D|-:R. APPARATUS FOR PRODUCNG HOOPING EFFECTS IN METAL TUBES.

APPLICATION FILED OCT. 29, i920. 154129,539.

PatentedSept. 19, 1922.

e SHEETS-SHEET e.

Egc.

Patented Sept. i9, i922.

'TTES PATENT ferries.

EUGNE SCHNEIDER, OF PARIS, FRANCE, ASSIGNOR TO SCHNEIDER Sc CIE., OFPARIS, FRANCE, A LIMITED JQINTI-STOCK COMPANY OF FRANCE.

APPARATUS FOR PRODUCING HOOPING EFFECTS'IN-METAL TUBES.

' Application filed October 2,9, 1920. Serial No. 420,523.r

10 all whom tmajz/ concern Be it known that I, EUGNE SCHNEIDER, acitizen of the `Republic of France, and resident of Paris, France, haveinvented new and luseful Improvements inApparatus for Producing HoopingEffects in Metal Tubes,

whichinvention 1s fully set forth in the following specification.

The present invention consists of im#y provements on Aan earlierinvention`r forv which a patent has been granted kand num-' bered1,388,872, wherein there is described an apparatus for producing hoopingeffects in metal tubes by successive Zones by means of a liquid 4forcedunder pressure into the annular space between the internal wall of thetube to be hooped and a hooping mandrel.

earlier patent comprises a device'for producing by va ,gradualdisplacement of the hooping mandrel, a vgradualincrease of the pressurein the annular space; the said displacement being automatically limitedby Va' discharge ofthe-liquid confined in the said.`

space through a duct closed by a lloaded valve, the load on'the valvebeingA automatically regulated according to a determined law, vand thisregulation being effected by ay mechanism controlled simultaneously bythe displacement of the mandrel and ing means. V y

In the constructional form described in the aforesaid earlier patent,-the discharge ofthe liquid takes .place .through an axial passage inthe mandrel, said passage opening into a discharge duct formedin anouter by a guidextension of the vsaid mandrel, the loaded.y

valve being situated at the outlet thereof- The hooping` of tubes ofgreat length requires of course a mandrel of correspondingv length whichis ydifficult to provide in one piece. Consequently it is Anecessary tomake the mandrel in at least two sectionsconnected together. by a`joint. At the moment when these joints pass out of the tube to behoop'efd,

rEhe apparatus described in the said ticularly a ydevice for guiding theouter end of the mandrel in its' exitr from the tube. The accompanyingdrawings illustrate a practical example of theimproved construction.

Complementary Figs. Vl, l are a longitudinal sectional elevation of thegeneral arrangement, taken through the axis of the tube thatvis beingsubjected to the hooping operation.y f

Complementary Figs. 2, 2a are a similar detail sectional elevationillustrating the device for discharging the liquid and for regulatingthe load on the valve.

Figs. 3 and 4 are sections respectively on vthe lines III and IH, IV andIV of Fig. 2a. FFig. 5 is a section on the line V-V of Fig. 6 is asection on the line VI-Vl of Fig. 2.

- In these figures, A is the tube to be hooped, resting upon suitablesupports B 5. C is the hooping mandrel engaged in thetube. The

ldischarge .of the liquid,finstead of taking place, as in theconstructional" forni dcscribed in, the aforesaid earlier patent,through an axial duct formed in the mandrelfC, nowftakes place through aducto formed inthe tube A close to the end of the latter, fthrfoughwhich the mandrel passes out. The result is that the loaded valve which4normally `closes the said duct, is lodged @inA alboxafarranged in arecess formedy in f the i end of the tube A. This valve may, as in theexamples described in vthe aforesaid earlier patent, be constituted byaball G pressed upon its seat by a finger H under the v.action of alever I which is ful'crumed on a support Jy that is likewise` lattachedto the tube A. Cn this lever l there is adapted to slide a weight K, the

loadon the valve varying-accordingto the the oint or oints between thesections of the mandrel, and further that the mandrel is not weighted atits free end by the device` that regulates the load on the valve, sincethe said device is supported partly by the tube and partly by the rearcrosshead X1.

The connecting device between the mandrel and the load on the valve, hasbeen modified in the new constructional form, as follows Upon the rearcrosshead X1 which by its connection with the front crosshead X by meansof the rods Y, maintains the tube A in position for hooping, there isfixed a support M carrying bearings m in which an end ess screw L isjournalled. @n this screw a nut is adapted to move which is providedwith arms in the form of a fork 701- in which the weight li slipped onthe rod I, rests by means of studs lil. The nut 7s is suitably guided inthe support M (Fig. 6).

On the extension of the endless screw L there is fixed a pinion L1connected by a chain L2 to a toothed wheel L3 fixed on a shaft ya whichis ournalled in bearings carried by the support l) of the slotted guidet), the slot in said guide being inc-lined from one end of the guide tothe opposite end thereof. A gear connects the shaft pf to the hoopingmandrel This gear comprises for example a rack N carrying at its upperend an axle-pin al guided in slots formed in side members nl fixed to asleeve n2 which is slipped upon the outer end of the mandrel C and is.fixed to the latter by bolts a. The said rack N carries at its lowerend a roller n engaged in the slot O. Witi the rack N there meshes apinion N1 mounted on shaft N2 journalled in the support of P, andcarrying on its front end a toothed wheel N5 meshing with a pinion N*fixed on the shaft p.

Since the shaft N2 has a length corresponding to that of the longesttubes to be f hooped, it is necessary to provide it with intermediatebearings; but these bearings must be constituted in a special manner soas to allow the sliding pinion N1 to pass freely in its movements alongthe shaft.

According to the present invention the said bearings are constituted bytroughs l forming one of the sides of a jointed parallelogram, theopposite side being formed by a projection 2 of the support l). Thevertical sides 3 of the jointed parallelogram are extended beyond theirlower pivot by counterweights 4. The pinion N1 is held in a box a5 fixedto a support or carrier N5 on which is formed the sleeve n2. All exit ofthe mandrel C due to the liquid under pressure acting upon the front endof the hooping mandrel, will produce a displacement of the support N5.Vhen the box a5 meets one of the intermediate bearings l which hasentrance ramps at its ends (Fig.

l), it will cause a tipping of the arms 3, 3 to which the bearing isjointed, and it will bring them into the position indicated in dot anddash lines in Fig. 1.

As soon as the pinion has moved beyond the end of the bearing, thelatter will be caused by the action of the counterweights 4L to resumeits position of rest shown in full lines.

The rack N which is compelled to follow the slotted guide O in which theroller n is engaged, rises and falls according to the position assumedby the said roller. En these vertical movements the said rack ac tuatesthe pinion N1 which transmits in itsr turn the motion through the shaftN2, thel toothed wheel N3 and the pinion N4, to the shaft p, andconsequently to the wheel L5, and through the latter to the chain L2 andpinion L1. The screw L is thus actuated, and, by its rotation, causes alongitudinal displacement of the nut k driving the weight K.

ln practice it is advisable to make the sleeve a2 adjustable as toheight relatively to the sliding support or carrier N5 for the purposeof obviating any defiectionof the hooping mandrel or of the shaft N2 inthe case of a want of' parallelism between their axes. As a matter offact a bending strainupon the mandrel C would have the dra-wback ofdestroying the tightness of the fixed joint D. As shown in Fig 3, thesleeve a2 rests on the slide block or carrier N5 through the medium of acradle i 5 bearing with its inclined lower faces a5 u-pon wedges N7 thatare capable of sliding by means of an internal screwthread onscrewthreads a5 of opposite hands formed on an axle N2 journalled in thesaid slide block N5, and to which rotational motion can be imparted bymeans of a crank N5. By turning the latter in the desired direction, thewedges N7 are moved nearer to or away from each other, thereby producingthe rising or falling movement of the cradle N5, and consequently of themandrel C resting on it.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same isl to be performed, l declarethat what I claim is l. In an apparatus of the character described, amovable mandrel projecting through one end of the tube being treate-land having a head at its opposite end", a duct formed in said tube nearthe end through which the mandrel projects, a loaded valve in said duct,guide means supported independently of said tube, mechanism engagingsaid guide means and actuated by the mandrel on movement thereof, andmeans controlled by said mechanism for automatically regulating the loadof said valve.

2. In an apparatus of the character described, a movable mandrelprojecting through one end of the tube being treated and having a headat its opposite end, a loaded valve in the end of the tube through whichthe mandrel projects, an endlessscrew, a nut movable along said endlessscrew by rotation of the latter and carrying` the load of said valve,guide means supported independentlyof said tube and provided with aninclined slot, a shaft journaled yon the sup-port for said guide means,mechanism actuated by the mandrel on movement thereof for impartingmotion to said shaft, saidmechanism including a pinion splined to theshaft for movement longitudinally7 thereon and a rack meshing with thepinion and provided with a roller engaging said inclined slot, and meanswhereby said nut is moved to regulate thefload of said valve, said meanscomprising gears keyed to the shaft and endless screw respectively, andan endless chain engaging the teeth of said gears.

3. In an apparatus of the character described, a movable mandrelprojectingV through one end of the tube being treated and having a headat its opposite end, a loaded valve in said tube near the end throughwhich the mandrel projects, gui-de means supported independently of thetube and provided with an inclined slot, a shaft journaled on thesupport for said guide means, mechanism actuated by the mandrel onmovement thereof for imparting motion to said shaft, said mechanismincluding a gear splined on the shaft for movement longitudinallythereon and a rack meshing with said gear and provided with a rollerengaging said inclined slot, bearings for said shaft disposedintermediate the ends thereof and pivotally mounted on said support toprovide for movement of the gear along the shaft, and means impartingmotion of said shaft to the load of said valve for automaticallyregulating the same.

4. In an apparatus of the character described, a movable mandrelprojecting through one end of the tube being treated and having a headat its opposite end, a loaded valve in the tube near the end throughwhich the mandrel projects, guide means supported independently of thetube, a shaft journaled on the support for said guide means, mechanismfor imparting motion to said shaft, said mechanism engaging the guidemeans and being actuated by said mandrel on movement thereof, means forautomatically regulating the load of said valve and controlled by themotion of said shaft, and means for regulating the distance between saidmandrel and the shaft, said regulating means comprising a carriermovable along said support, 'a cradle attached to said carrier andsupporting the project` ing end of said mandrel and relativelyadjustable wedges between the carrier and cradle. y

5. In an apparatus of the character described, a closure for one end ofthe tube being treated, a mandrel axially movable within the tube andhaving one end projecting through said closure, a head secured to theopposite end of said mandrel, said mandrel and tube providingan annularchamber to contain the deforming fluid, a duct in the tube adjacent tosaid closure and providing for discharge of fluid from the chamber assaid head advances, and means controlling the flow of fluid through saidduct.

6. In an apparatus of the character described, a closure for one end ofthe tube being treated, a mandrel axially movable within said tube andhaving one end pro-' jecting through said closure, a head secured totheopposite end of said mandrel, said mandrel and tube providing an annularchamber to contain the deforming fiuid, a duct in the tube adjacent tosaid closure and providing for discharge of fluid from the chamber assaid head advances, a loaded valve controlling the flow of fluid throughsaid duct, and mechanism for varying the load of said valve. y i

7. In an apparatus of the character described, a closure for one end ofthe tube being treated, a mandrel axially movable within said tube andhaving one end pro j ecting through said closure, a headsecured to theopposite end of said mandrel, said mandrel and tube providing an annularchamber to contain the deforming fluid, a duct in the tube adjacent tosaid closure and providing for discharge of fluid from the chamber assaid head advances, a loaded valve controlling the flow of fluid throughsaid duct, and mechanism supported independently ofthe mandrel forvarying the load of said valve.

8. In an apparatus of the character described, a closure for one end ofthe tube being treated, a mandrel axially movable within the tube andhaving one end projecting through said closure', a head secured to the v9. An apparatusfor producing hooping effects in metal tubes by thecompression of fluid therein including a mandrel axially movable intheborel oi' the tube being treatof the tube and comprising a ed, incombination With a support adapted to carry the end ot the mandrelleaving the tube, said support being movable in parallel relation to theaxis o the tube and operating to maintain the mandrel in axial alinementwith the bore or' the tube.

10. An apparatus lor producing hooping eillects in metal tubes by thecompression oi' fluid therein including a. mandrel axially movable inthe bore oi the tube being eated, in combination with a vertically adjastable support adapted to carry the end oi the mandrel lea-ving thetube, said support being movable in parallel relation to the axis of thetube and operating to maintain the mandrel in axial alinemcnt with thebore olt the tube.

11. in apparatus for producing hooping effects in metal tubes by thecompression otl lluid therein including a mandrel axially movable in thebore of the tube being treated, in combination with a guide-Way inparallel relation to the axis of the tube and having a support movablethereon adapted to carry the end of the mandrel leaving the tube, saidmovable support operating to maintain the mandrel in axial alinementwith the bore ot the tube.

12. fin apparatus tor producing hooping` effects in metal tubes by thecompression ol' iiuid therein including a mandrel axially movable in thebore oit the tube being treated, in combination with guide-way inparallel relation to the axis of the tube and having a support movablethereon provided with a vertically adjustable member adapte-:3l to carrythe end of mandrel lea-ving tube, said movable support and verticallyadjustable member operating to maintain the mandrel in axial alinementwith the bore ot the tube.

13. An apparatus ifor producing hooping etlects in metal tubes by thecompression ot lluid therein including a mandrel axially movable in thebore ol the tube being treated, in combination with means adapted tosupport the end ot the mandrel leaving the tube, said means operating tomaintain the mandrel in axial alinemcnt with the bore olI the tube andcomprising a guide-Way having a slide movable thereon, and a cradlevertically adjustable on the slide to carry the outer end of themandrel.

1%. An apparatus :tor producing hooping effects in metal tubes by thecompression of lluid therein including a mandrel axially movable in thebore ot the tube being treated, in combination With means adapted tosupport the end of the mandrel leaving` the. tube, said means operatingVto maintain the mandrel in axial alie-ement With the bore A guide-Wayhaving a slide movable thereon, a cradle mounted on the slide to carrythe outer end of the mandrel, and relatively adjustable wedges betweenthe slide and cradle providing ior vertical adjustment of' said cradleon said slide.

15. .An apparatus for producing hooping effects in metal tubes by thecompression of fluid therein including a mandrel axially movable in thebore of the tube being treated, in con'ibination ivith means adapted tosupport the end of the mandrel leaving the tube, said means operatii'igto maintain the mandrel in axial alinement with the boie of the tube andcomprising a guide-way having a slide movable thereon, a cradle mountedon the slide and carrying a sleeve displaceably mounted on the outer endofi the mandrel, ancL means for vertically adjustimg` the cradle on theslide.

16. ln combination, a tube, a member axially movable Within the tube, aloaded valve in the Wall of said tube, and means actuated by saidmovable member for varying the load of said valve.

17. ln combination, a tube, a mandrel axially movable Within said tube,a duct in the Wall o'll said tube, a loaded valve in said duct, guidemeans, mechanism cooperating with said guide means and actuated by saidmandrel on movement thereof, and means controlled by said mechanism forautomatically regulating the load of said valve.

1S. fin apparatus of the character described, including al mandrelaxially movable Within the tube being treated and projecting from oneendthereof, a head secured to said mandrel, a duct formed in the tuberemote 'from the initial position of said head, and a loaded valve insaid chiot 'for controlling the flow of fluid therethrough as said headadvances, in combination with mechanism for varying the load of saidvalve, a member provided with an inclined slot, an element mounted onthe projecting end of the mandrel 'for movement therewith and engagingsaid inclined slot, and mechanism operating` by the movement ot saidmandrel and element to actua-te said loadvarying mechanism.

19. lin apparatus for producing hooping edeets in metal tubes, includinga mandrel axially movable Within the tube being treated, a head securedto said mandrel, a duct formed in the tube remote from the initialposition ci said head, and a loaded valve in said duct for controllingflow ot luid therethrough as said head advances, in combination With araclr slidably mounted on the projecting end of said mandrel, meansimparting sliding` movement to said rack as the mandrel advances, ashaft extending in parallel relation with the axis of said mandrel,means tor imparting rotation to said shaft actuated by the slidingmovement ot said rack, said means comprising a pinion splined on theshaft to move longitudinally thereon and engaged by the rack, and meanstransmitting rotative movement of the shaft to said valve load-varyingmechanism.

20. An apparatus for producing hooping effects in metal tubes, includinga mandrel axially movable within the tube being treated, a head securedto said mandrel, a duct formed in the tube remote from the initialposition of said head, and aloaded valve in said duct for controllingflow of fluid therethrough as said head advances, in combination withload mechanism for said valve comprising a lever connected with thevalve, an endless screw, a weight engaged by said endless screw andmovable along the lever by rotation of the screw, and means actuatingsaid mechanism to vary the load on said valve and made effective bymovement of the mandrel, said means comprising a sleeve detachablysecured on the projecting end of the mandrel, a guide member providedwith an inclined slot, a rack slidably mounted on said sleeve andreceiving motion by engagement thereof with said inclined slot, a shaftextending in parallel relation with the axis of said mandrel, a pinionsplined on said shaft to move longitudinally thereon and impartingrotation to the shaft by engagement with said rack, and gearing fortransmitting rotative movement of the shaft to said endless screw. o

21. An apparatus for producing hooping effects in metal tubes, includinga mandrel axially movable within the tube being treated, a head securedto said mandrel, a duct formed in the tube remote from the initialposition of said head, and a loaded valve in said duct for controllingflow of fluid therethrough as said head advances, in combination withmechanism for varying the load of said valve, said mechanism including ashaft extending in parallel relation with the axis of said mandrel and apinion splined to the shaft for movement longitudinally thereon, a rackslidably mounted on the projecting end of the mandrel to move therewithand engaging said pinion, means coupling the rack with said pinion toprovide for constant engagement therebetween, means actuating said raclrand pinion as themandrel advances thereby imparting rotation to saidshaft, and means transmitting rotative movement of the shaft to thevalve load-varying mechanism.

22. An apparatus for producing hooping effects in metal tubes, includinga mandrel axially movable within the tube being treated, a head securedto said mandrel, a duct formed in the tube remote from the initialposition of said head, and a loaded valve in said duct for controllingflow yof fluid therethrough as said head advances, in combination with aguide way having substantially parallel relation with the mandrel axis,a support movable on the guide way yand carrying the projecting end ofthe manmeans actuating` said rack and pinion as the f mandrel advancesthereby imparting rotationto said shaft, means holding the rack andpinion in engagement during the advancing movements of the mandrel andits support, and means imparting rotative movement of the shaft to saidvalve load-varying mechanism.

23. An apparatus of the character described, including` a mandrelaxially movable within the tube being treated, a head secured to saidmandrel, a duct formed .in the tube remote from the initial position ofsaid head, and a loaded valve in said duct for controlling flow of fluidtherethrough as said-head advances, in combination with mechanismtransmitting motion of the mandrel tothe valve for varying the loadthereof, said mechanism including a shaft and an element driving saidshaft by rotation therewith and movement longitudinally thereon,

'and means supporting said shaft at a point intermediate the endsthereof and movable by said element to prevent interference withlongitudinal motion of the latter along the shaft.

y 24E. An apparatus of the character described, including Va mandrelaxially movable within the tube being treated, ya head secured to saidmandrel, a duct formed in the tube remote from the initial position ofsaid head, and a loaded valve in said duct for controlling flow or fluidtherethrough as said head advances, in combination with mechanismtransmitting motionof the mandrel to the valve for varying the loadthereof, said mechanism including a shaft and an element driving saidshaft by rotation therewith and movement longitudinally thereon, meanssupporting said shaft at a point intermediate the ends thereof andmovable by said element to prevent interference with longitudinal motionof the latter along the shaft, and means normally maintaining saidsupporting means in engagement withr said shaft and adapted tore-establish said engagement when said element has traveled beyond saidsupporting means.

25. An apparatus of the character described, including a mandrel axiallymovable within the tube being treated, a head secured to said mandrel, aduct formed in the tube remote from the initial position of said head,and a loaded valve in said duct for controlling flow of iiuidtherethrough as said head advances, in combination with mechanismtransmitting motion of the mandrel to the valve lfor varying the loadthereof, said mechanism including a shaft and an element driving saidshaft by rotation therewith and movementl longitudinallj7 thereon, and emovable auxiliary support for said shaft disposed et a.v pointintermediate the ends thereof, said support Comprising a plurality ofpivoted levers provided with 'weights at their lower ends and aJ troughconnected to their upper ends for normal engagement with the under sideof the shaft, said driving element operating to depress the trough clearof the shaft and said l0 weights operating lto establish supportingengagement of the trough with the shaft.

In testimony whereof I have signed this speeleation.

EUGENE SCHNEIDER.

YVitnesses ANDR MOSTICKER, LOUIS GARDET.

